You can have the best of all underwater worlds with the Uniquarium Quadra: seamless curved viewing area lets you see from any angle while 90 degree back fits snug into a corner. All mechanicals fit behind the black screen out of sight. Beginners love the all-included simplicity while pros respect the high-capacity Bio-Fil 3-way filter Rio high-flow powerhead and more maintaining perfect environmental peace without distracting tubes pumps or hoses. Additional slots are provided for heaters and ve nturi skimmers (not included)